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Funded Project |
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Funding Program:
Regional IPM Competitive Grants - Northeastern |
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Project Title:
Integrating Crop Rotation and Plant Resistance in Onion Pest Management (1997-1999) |
Project Directors (PDs):
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Lead State: NY Lead Organization: Cornell University |
| Research Funding: $65,124 |
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Start Date: Aug-01-1997 End Date: Jul-31-1999 |
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Pests Involved: onion maggots, botrytis leaf blight |
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Site/Commodity: onions |
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Area of Emphasis: cultural controls, plant resistance, crop rotation |
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Summary:
This project follows a related project funded in 1996.
Objectives: 1) Determine whether Botrytis leaf blight can be controlled on tolerant or resistant onion types with reduced fungicide application rate or frequency. 2) Determine the duration of the benefit of area-wide rotation for onion maggot management, and its effect on chlorpyrifos (Lorsban) resistance development, as well as the relationship between of plant tolerance and the dosage level of chlorpyrifos required to control onion maggot. 3) Evaluate the effectiveness of within-area rotation for reduction of populations of weeds and soil borne pathogens and for onion yield improvement. Outcomes and Impacts Summary from 2001 IPM Center report Two of the major pests that threaten onion crops in the Northeast are Botrytis leaf blight (BLB) and onion maggot. Without controls, these pests could bring about complete economic losses for onion growers. An interdisciplinary research team explored practices that might reduce pest pressure on onions and allow growers to manage onion pests effectively and economically with less pesticide. They are in the process of developing two onion varieties that can resist BLB, one of which might be available to growers in the near future. Adoption of these BLB-resistant varieties could substantially reduce dependence on fungicides in onion production. The project team (Martha Mutschler, Roy Ellerbrock, James Lorbeer, and Charles Eckenrode) has also explored the benefits of crop rotation for slowing the development of pesticide resistance among onion maggots, improving onion yield, and reducing weeds and soil-borne pathogens. The results show promise for reducing levels of onion maggot and other pests in the crop. This work is helping to increase grower interest in crop rotation techniques, and growers are now testing rotations themselves. |
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